Optimization Strategy of Rolling Mill Hydraulic …
However, the rolling mill hydraulic roll gap control system studied in this paper is a complex nonlinear system, for which is difficult to obtain accurate model. Aiming at the above problems, combined with …
Development of Modern Hot Strip mill and its Main Features
The mill stabilizer device consists of hydraulic cylinders with orifices which act as a damping system and eliminate the clearances between the roll chocks and housing, thereby reducing the thrust forces along the axial direction of the mill rolls.
HydroForce® MILL HYDRAULIC SYSTEMS – Edwards …
The Edwards mill hydraulic system and accumulators are based on more than 50 years of experience in the sugar cane industry. Their primary purpose on mill cap rams is to establish a desired average opening to the mill, subject the cane and bagasse to pressure, and increase the mill opening under a yielding force, when necessary.
Improvement of Hot Rolling Technology to Reduce the "Rolled …
Abstract. Based on the results of the published literature and production experience, technical and technological measures were developed and implemented to reduce the «rolled-in scale» defect: collectors with water descaling nozzles for removing furnace scale were replaced with new ones manufactured by Spraing Systems; the …
Steel Mill
Roll stand hydraulic system; Planetary & ring rolling, cold pilger mill; Caster & Oscillator; LMS hydraulics ; Tundish gate; Roll change hydraulics; Peel bar hydraulics; Reheat furnace; Tandem cold roll mill hydraulics; …
Modelling of the hydraulic work roll bending control system …
For modern hot rolling mills the typical hydraulic circuit was designed to control the roll bending force during rolling process. The most common operating modes of the roll bending system were studied: rolling, start and stop. The bending roll control system was designed in the form of functional blocks, connecting the actuators, sensors and sided …
(PDF) Hot Rolling Mill Hydraulic Gap Control (HGC) …
In this article the AGC (Automated Gauge Control) system, of a hot rolling mill is analyzed and different methods are described to improve its performance. ... 2015 Hot Rolling Mill Hydraulic Gap Control (HGC) thickness control improvement Peter Kucsera*, Zsolt Béres** * Óbuda University, Tavaszmező u. 15-17, H-1084 Budapest, Hungary kucsera ...
Hot rolling mill AGC system and rolling control method thereof
Along with the quickening of aluminium alloy new product paces, the rapid lifting of exploitation kind class, varieties distribution implementation.The successful modification of hot-rolling mill AGC hydraulic system improves control accuracy, response speed etc., which determines final performance and the sheet material position commercially of …
Hot Rolling Mill Hydraulic Gap Control (HGC) …
The positive roll bending force influences the mill stretch force, but does not have any effect on the rolling force. Figure 5 Work roll bending forces in 4-roll mills 1.6 Tapering The hot rolled strip is later processed by a …
Hot & Cold Rolling Mill Equipment
With more than 70 temper mills in our history, why not let Butech Bliss be your temper or skin pass mill supplier. Typically these upgrades include: Conversion to hydraulic roll force system. Work roll bending with …
Dynamic matrix predictive control for a hydraulic looper system in hot …
Controlling the looper height and strip tension is important in hot strip mills because these variables affect both the strip quality and strip threading. Many researchers have proposed and applied a variety of control schemes for this problem, but the increasingly strict market demand for strip quality requires further improvements. This …
Narrow Hot Strip Rolling Mills – Preet Group
Since close to half of all steel produced is hot-rolled to strip, mills require maximum throughput and availability combined with geometrical precision and the ability to create optimum material properties. ... Compact Cold …
Vertical–Horizontal Coupling Vibration of Hot …
This study establishes a vertical–horizontal coupling vibration model of hot rolling mill rolls under multi-piecewise nonlinear constraints considering the piecewise nonlinear spring force and …
Hot Rolling Mill Hydraulic Gap Control ( HGC ) thickness …
In this article the AGC (Automated Gauge Control) system, of a hot rolling mill is analyzed and different methods are described to improve its performance. The mill stretch compensation and other disturbances during the rolling process are compensated and a rolling speed dependent, adaptive PI controller is developed to accomplish fine …
Hot & Cold Rolling Mill Equipment …
Typical upgrades to hot mill stands include the addition of roll bending for profile and shape control as well as the installation of hydraulic roll force systems for automatic gauge control. Customers are also looking to see …
Non‐linear optimal control for the hot‐steel rolling mill system
The control problem of the hot-steel rolling mill is thus formulated in two levels: (i) from to one computes the control inputs and that should be applied to the hot-steel roll mill system so as to assure that the angle of the looper and the tension on the strip will reach the desirable setpoints, (ii) the control inputs and become setpoints ...
System of automated control of Hydraulic screw-down …
The RPSACS may comprise systems for automated control of tension, thickness (as a rule, based on hydraulic roll screw-down), flatness, etc. [72] [73][74][75] Mills with multi-roll passes are not ...
Principles of the hydraulic control system of the Rautaruukki hot …
The steel plate hot rolling process is affected by the functioning of the hydraulic system of the mill. The main elements of the hydraulic system are hydraulic fluid, filters, pumps, motors ...
(PDF) Hot Rolling Mill Hydraulic Gap Control …
The positive roll bending force influences the mill stretch force, but does not have any effect on the rolling force. Figure 5 Work roll bending …
Research on Multi-System Coupling Vibration of a Hot Tandem Mill
Vibration in hot tandem rolling mills has been a problem in the iron and steel industry mainly due to its unpredictability. In this work, vibration data of the second finishing mill (F2) stand of a hot tandem rolling mill are collected and analyzed, and a mathematical model based on the coupling of a non-uniform deformation process, mill structure and …
Modelling of the hydraulic work roll bending control system …
For modern hot rolling mills the typical hydraulic circuit was designed to control the roll bending force during rolling process. The most common operating modes of the roll bending system were ...
Hot Rolling Oil for Steel Plants – A Case Study
Hot Rolling Oil A is useful in improving productivity of the mill and life of rolls. Regular use of Hot Rolling Oil A at the six finishing stand of Hot Strip Mill has demonstrated achievement of following benefits: (a) Reduction in roll force and power by around 6-10%, helping in rolling of steels in critical sizes.
Non‐linear optimal control for the hot‐steel …
The control problem of the hot-steel rolling mill is thus formulated in two levels: (i) from to one computes the control inputs and that should be applied to the hot-steel roll mill system so as to assure that …
Hot strip mills Mechanical equipment
HOT STRIP MILLS 6 Hydraulic adjusting systems for horizontal and vertical stands Vertical stands To control the width of the strip from head to tail, we ... speeds, so the transfer bars leave the roller table faster. Coilboxes with transfer mandrels can be revamped to incorporate all the benefits of a mandrel-less coilbox.
Modeling Simulation of Hydraulic Gap System in Hot …
ty, rolling force, mill speed, oil film thickness in roll bearings, impact transients, mill stretch, interstand tension, strip modulus, slippage and roll gap. Over the years, considerable research efforts have been directed in this field. Kondoet al.1) have shown that the AGCthickness control system controlling the strip tension (reel motor ...
Rolling Mills | Metal Rolling Mill Machine | Rolling …
Our staff of experts collaborates with customers to create customized rolling mill machines for unique requirements. Mills are produced in a variety of sizes, ranging from a roll size of 3" (76mm) in diameter to a roll size of …
Shape Control Technologies in Hot Strip Mill – IspatGuru
Fig 6 shows a TP roll. It consists of an arbor, sleeve, and taper piston, and adjustments of the roll profile by hydraulically adjusting the taper piston position. The profile can be more freely adjusted by installing two pistons at each side. TP rolls are used for hot rolling mills whose back-up rolls have a large barrel length.
Hot Rolling Mill Hydraulic Gap Control (HGC) thickness …
The positive roll bending force influences the mill stretch force, but does not have any effect on the rolling force. Figure 5 Work roll bending forces in 4-roll mills 1.6 Tapering The hot rolled strip is later processed by a cold rolling mill, and to facilitate the threading operation, tapering is applied.
Width control systems with roll force automatic width …
This paper proposes a new width control system composed of an RF (roll force) AWC (automatic width control) in the roughing mill and a FVM (finishing vertical mill) AWC in the finishing mill which aims at obtaining the desirable width margin in the hot strip mill.The RF AWC is designed by the control model on the basis of a gauge meter …
Width control systems with roll force automatic width control …
A hydraulic AWC system and the setup model of the vertical mill are also proposed Alan Davies, 1989, ... The width of the hot rolled strip is nearly determined at this stage. The strip of the exit of roughing mill is rolled once more at the vertical mill (F0E) of F0 stand and moves to the finishing mill process. ... Development of the width ...